Device for lining closures



Nov. 11, 1941.

' H. E. GERLITYZKI) DEVICE FOR LINING cflosu'nEs Filed Dec. 31, 1938Patented Nov. 11, 1941 para STATE OFFICE DEVICE-FOR LINING CLQSURESHarry E. Gerlitzki, Lancaster, Pa, assignor to Armstrong Cork Company,Lancaster, Pa a corporation of Pennsylvania Application December 31,1938, Serial No. 248,859

3 Claims. (Cl. 113-80) My invention relates to a device for liningclosures and more particularly to a device for posi tioning liners inscew threaded closures so as to insure proper adhesive securement of theliner to the closure throughout substantially the entire extent of thearea of contact therebetween.

It is well known that in the manufacture of molded closures,particularly in the larger sizes. there is considerable warpage of thehead portion of the closure resulting in the creation of a slightlyconcave or domed inner head surface. Even in the smaller sizes thisaction will cause the inner surface of the head portion to be elevatedout of its normal plane from .005" to .010". This necessitates that theliner be properly deformed out of its normally flat shape to assume thesame contour as the head portion, to insure a satisfactory securement bythe adhesive disposed between the closure and a liner. Another problemarises in closure assembly by reason of the screwthread iormationson'theinner surface of I the skirt of the closure. In order to insureprop-.

er sealing, the liners are generally of greater ex ternal diameter thanthe internal diameter of the skirt at the screw threads and this oftenresults I.

in the liners being deformed or held by the screw thread projections;against proper engagement with the head of the closure. This problemexists in both molded and metal screw thread closures and the problem ofsecuring a flat disk-' like liner to a'concave surface arises in moldedclosures for the reasons advanced above and in metal closures havingadomed head surface for purposes of appearance. i

Heretofore, in the lining of such closures, it

has been common practice to place a drop of ad hesive in the centralportion 0mm closure and then press theliner with a flat pressingsurface. This operation has been generally unsatisfactory sinceconsiderable adhesive mustbe used inorder to fill the gap which existsbetween fthe i domed inner head surface and the flat surface of thedisk-to be secured thereto.

According to my invention, I provide a device which isadapted to engagethe central portion of the liner, leaving the edge portion free fordeformation, and to urge the central portion of the liner intoengagement with the head of the 010- sure throughout its extent, theliner engaging surface of the pressing device being contoured tosubstantially he contour of the inner'surface of thecl'osure in itscorresponding area." The device is so constructed and arranged that,after the initial pressing of the central portion of the liner intoproper position, an auxiliary pressing surface engages the edge portionof the liner urging it into proper engagement with the head of theclosure, overcoming any tendency for. the liner to be improperly alignedby'reason' of en--" gagemenifwith the screw thread formations or byreason of deformation of the peripheral portion of the liner effected bythe initial deformation of the central portion thereof.

In the drawing forming a part of this application, there is shown aview, somewhat diagrammatic, of the lining device of my inventionmounted upon the reciprocating arm of a closure lining machine.

Referring to the drawing, there is provided a support 2 for the closureto be lined. This may take the form of an index wheel for conveying theclosure intermittently into various stations such as the glue applyingstation, the liner punching station and the liner pressing station Ishown in the drawing. There is shown a ,molded 1 closure 3 positioned onthe support 2 which closure is provided with screw thread-formations lmolded in the skirt 6 thereof. The head or top portion. I of the closureat its inner surface is slightly'concave and a sealing liner I ofcardboard, cork, or the like, is shown in position in engagement withthe entire inner surface of the head 6. It will be noted that the outerdiameter of the liner I is of greater diameter than the inner diameterof the screw thread'formations 4 so I that the liner I must be slightlydeformed at its periphery so as to pass to its final position beyond thethread formations 4. As a result of this deformation, the liner .I 'doesnot properly engage the head portion 6 throughout the extent of itsinner surface.

The lining device proper is shown in partially depressed position in thedrawing.' The device comprises a supporting pin ,8 which is secured tosupporting pin 8 is provided with ashoulder l3 and is reduced indiameter therebelow in the area it, the end of the reduced portionslidably projecting into an opening in a primary pressing membersupporting casing i5. Alocking pin i6 is secured to the projecting end Iof the supporting pin 8 and operates within a slot l1 provided in thecasing l5 so thatthe casing. l5 and pin 8 are free for limited movementwith respect to each other in a vertical direction. A spring l8encircles the portion ll of the pin 8 and is disposed between theshoulder lilof-the pin 8 and the top of the casing l5, urging the casingIE to a normal position with the pin 16 in engagement i .with the top ofthe slot l'l as shown in the drawing. I

The casing l5 is provided with a central bore l9 which receives, aprimary pressing member 20 which is free for limited vertical movementtherewithin, being restricted against free movement by a pin 2| securedthereto and operating within a slot 22 provided in the body of thecasing-- 15. The primary pressing member 20 is normally urged to aposition exterior of the edge of the casing by a spring 23 whichis-disposed within the bore l 9 and is heldlmder compression between thebody of the casing l5 at the bottom 24 of the bore l9 and against theinner surface of the primary pressing member 20. It willbe noted thatthe primary pressing member is provided with a convex outer face 25 ofsubstantially the same contour as the inner surface'of the screw threadformations. cation is imparted to the arm 9 in a verticaldirection.causing the supporting pin 8 and its associated mechanism tomove-downwardly until the face 25 of the primarypressing member 20engages the liner 1. As downward .motion continues,'the liner 1 isdeformed from its planar form and is forced into engagement with thehead of the closure, beingurged into such position by the face 25 of theprimary pressing member. As

In many instances the liner will be disposed away from the head beingengaged with Motion of recipromary pressing member 20 until such time asthe pin 2| engages the lower surface of the slot 22 in the casing l5,and thereafter the arm 9, the

' supporting pin 8 and the associated mechanism movesunitarily,withdrawing the inserting member from the closure so that the same maybe moved from the lining station and a new unlined closure presentedthereto.

It will be clear from the foregoing description that by mydevice theliner is first positioned with its central portion in engagement withthe head of the closure and this portion is placed under deformingpressure while permitting free and unrestricted deformation of the edgeportion to permit proper and complete conformation of the center portionof the liner with the head of the closure. After such engagement, theliner, about its edge adjacent the periphery, is forced into engagementwith the head portion, moving the liner out of engagement with the screwthreads if it be lodged there. The liner is heldunder compression at itscentral portion during such operation and the edge portion ismomentarily heldin deformed position and engagement with the headsurface until the auxiliary pressing surface is withdrawn.

While I have illustrated and described certain preferred embodiments ofmy, invention, it. will be understood that the invention is not solimited but may be otherwise embodied within tho scope of thefollowingclaims.

I claim:

1. In a device for. lining a screw threaded; closure having a concaveinner head surface with in liner disk of a diameter greater than theinner diameter of the closure at the threads. a primary downwardmovement progresses, the member 20 is caused to move relative to thecasing II, the

pin 2| moving in the slot 22 and thus the pres,- sure' of spring 23 istransmitted through the primary pressing element 20 to the liner Iholding 'the same in firm engagement with the head of the closure duringcontinued downward movement of the arm I. As this'movement'continucs,the auxiliary pressing surface 26 of the casing fl is brought intoengagement with the edge of the liner I thus causing the same to beproperly deformed to assume the contour of the inner surface of the headof the closure by movement of portion of such liner diskinto'conformity-with I pressing member of a diameter less than thediameter of the liner diskv to be positioned, a con-,

vex pressing surface .on said primary member engageable with the centralportion only of a liner disk to be positioned to press the central theconcave inner head surface of the closure and permit free andunrestricted deformation of such the casing l5 downwardly with respectto the V member 20.

Force is transmitted to the casing I 8 through the spring It, and afterengagement of the auxiliary pressing surface 28 of the casing II withthe liner I, continued downward movement of the arm 9 results inslidable movement of the pro jecting portion H of the supporting pin 8within the bore of the casing II, pin I. being moved away from the topof the slot l'l upon such relative movement. This continues until thearm 9 reaches its lowermost position. The supporting pin 8 isadiustablysecured to thB SlIDDOIt 0 so that movemento'f the projectingportion 'H of the pin 8-is arrested prior to'e'ngagement of the pin l Iwith the extreme end of the slot I] so that the forceapplied to thecasing I5 is always yieldingly cushioned by the spring I. Upon movementof reciprocation of the arm 9 upwardly, the auxiliary pressing surface28 remains in' engagement with the edge of the liner '1 until the pinitliner disk at its edge, a secondary pressing member carrying saidprimary pressing member and having an annular pressing surface disposedabout the pressing surface of said primary member and engageable .withthe surface of said liner disk along a line disposed adjacent its edgeto press such edge into conformity with the closure head, meansyieldingly urging'said primary member to a position with its pressingsurface exterior of the pressing surface of said secondary member, meansfor simultaneously moving said pressing members into position within aclosure to,be lined 'to thereby bring saidprimary pressing'sur'fa'ce'into engagement with the liner disk prio'i ft'opressing of the edgeportion thereof by the pr'essing surface of the secondary pressingmember,

and yielding means disposed between said moving means and said secondarypressing member to limit the pressure applied thereby.

2. A device in accordance with olairn 1 in which the pressing members=are carried by a support adjustably secured to the means forsimultane-.

ously moving the same into position.

3. A device in accordance with claim 1 in which 2 the secondary pressingmember is hollow and the primary pressing member is .slidable axiallythereinand in which a spring is provided in the secondary pressingmember to move theprimary,

engages the casing II at the top of the slot ll whereupon continuedupward movement causes the casing II to move with respect to thepripressing member to the position recited inclaim 1.

. HARRY E. GERLITZKI.

